For cases where a breadcrumb blocks needs to be on lots of pages on a site, I'll often create a GlobalArea, to place and manage an autonav block, using the breadcrumb configuration.

But with the recent caching improvements, I'm starting to turn on the cache a lot more, so I'm thinking more about how blocks might get cached.

I'm thinking that an autonav block in a Global area isn't going to be cached, as it outputs different content depending on the page it is... but an autonav that's in a normal Area is?

Am I right in my thinking here or is there a level of caching that happens on blocks in stacks/global areas that happens to help things?

I love using Global Areas to manage content, but am I perhaps making caching less likely to happen?

-Ryan